simplify each expression
1. (p^4q^2)(p^7q^5)
2. 45y^3z^10/5y^3z
3. (4h^5 k^3)(15k^2h^3)
4. 12a^4b^6/36ab^2c
5. (3m^2n)^4
6. (-5a^2b)()
7. (3x^4y)(2y^2)^3

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?